Adjustable sewing machine light



18h27, 1942. M. INGWER ETAL 2,271,194

ADJUSTABLE SEWING MACHINE LIGHT Filed'Oot, 10, 1940 JIaX 111 Wmmd Minuu-V. Nalin/urz,

INVENTOKS;

Patented Jan. 27, 1942 UNITED lSTATES PATENT oFFicE ADJUSTABLE SEWINGMACHINE LIGHT `Max Ingwer, Forest Hills, and Werner W.

Schwarz, New York, N. Y., assignors to Consolidated Sewing Machine &Supply Co. Inc., New York, N. Y., a corporation of New York ApplicationOctober 10, 1940, Serial No. 360,574

Claims. (Cl. 248-122) The invention here disclosed relates to lights forsewing machines and the objects of the invention are to provide auniversally adjustable form of light which can be quickly adjusted andsecured in practically any desired position, which will hold securely inthe position in which it has been set, .which will not become loosenedor released from vibration of the machine and which with all suchadvantages will be of simple, in-` expensive construction and thoroughlypractical in every way.

Additional objects and the novel features of construction, combinationand relation of parts by which all lobjects are attained are set forthor will appear in the course of the following speciiication.

The drawing accompanying and forming part of the specificationillustrates a commercial embodiment ofthe invention, but it should beunderstood that structure may be modified and changed as regards suchillustration, all within the true intent and broad scope of theinvention as hereinafter dened and claimed.

Fig. 1 is a broken part sectional iront elevation of one of the lightingattachments.

Fig. 2 is an enlarged broken sectional detail as on substantially theplane of line 2-2 of Fig. 1.

Fig. 3 is a broken sectional view as on line 3-3 of Fig. 2.

In the form of the invention illustrated, the lamp 5, is carried by asocket 6, on the angularly bent end of a tubular lamp carrying arm 1,and this arm is secured in variously adjusted relations by a specialform of clamp adjustably secured on the upper end of a post or pedestal8, having a base 9, for mounting it on the table of the sewing machine.

The special clamp consists of two interitting U-shaped members I Il, II,slidably engaged one within the other as indicated in Fig. 3, with thesides of the same in substantially parallel relation and having openingsI2, I3, therethrough for the lamp carrying arm and with the `opposedback portions of the same formed with partly spherical seats I4, I5, forthe ball head I6, on the upper end of the post.

Screws Il, extending through the back portions of the U-pieces atopposite sides of the ball socket with wing nuts I8, provide a means forsecuring the clamp in adjusted relation on the ball head and for settingthe clamp in gripping engagement with the lamp tube.

This double clamping action will be clear from- Fig. 3, Where it Will beseen that tightening the wing nuts I8 will bring the back portions ofthe U-shaped clamped jaws together over the ball head between the sameand that in such clamping movement, the perforated jaw portions of theclamp members will be forced in opposite directions, that is, the outerjaws with openings I3, toward the' left in Fig. 3. and the. inner jawswith perforations I2, toward the right in that view. The opposite travelof the two sets of jaws causes such jaws Ato, clamp the pipe atseparated points at opposite sides of the ball head center.

Usually the U-shaped clamp pieces are made of relatively thin and moreor less springy sheet metal, which will bend readily under the force ofthe clamping screws to firmly grip the ball head and to rigidly clampthe lamp tubing.

Uponk loosening the wing nuts, the U-mem- Abers will release their gripon the ball head and their hold. on the tubing, permitting the clamp tobe then shifted about to any desired angle and permitting the lamptubing to be both slid longitudinally and rotated in different angularrelations.v made by simply taking hold `of the lamp,once

f the clamp is loosened and locating it in the desired position, whereit will then be held upon simply tightening the wing nuts. The strainingor bending of they clamp members places these members under more or lessspring tension,

which has the effect of preventing the parts from becoming loose evenunder severe conditions of vibration. i

'To prevent the screws from turning, when the wing nuts are tightened orloosened, said screws may be set tight in screw seats I9, in the innerclamp plate and pass loosely through openings 20, in the outer clampplate. When the parts are tensioned by tightening the wing nuts, thescrews, through the bend imparted to the plate, become all the morefirmly held against turning in the screw seats.

The ball head I6 is shown carried by plug 2|, seated in the upper end oftubular post 8, and held by a screw 22. The elongated and reduced neckportion 23, supporting the ball head, permits the clamp to be rocked toextreme angular positions.

The electric supply cord 23 for the lamp is shown as extended throughthe tubular lamp carrying arm, so as not to interfere with adjustment ofthe arm for its full length within the jaws of the clamp.

What is claimed is:

1. An adjustable lamp support, comprising in combination with a lampcarrying arm, substan- These adjustments may usually'be tially U-shapedbrackets disposed one within the other, with the back portions of thesame in opposition and provided with opposed ball seats, the sides ofsaid brackets having openings receiving said lamp carrying arm, a ballhead engaged by said ball seats and screw means for adjustably securingthe back portions of the brackets together over said ball head.

2. An adjustable sewing machine light, comprising a lamp carrying arm,substantially U- shaped clamp members disposed one within the other andhaving opposed back portions and side arms with openings receiving saidlamp carrying arm, a support interposed between said back portions andscrew means for adjustably drawing said back portions together atopposite sides of said interposed support.

3. An adjustable sewing machine light, comprising a lamp carrying arm,substantially U- shaped clamp members disposed one within the other andhaving opposed back portions and side arms with openings receiving saidlamp carrying arm, a support interposed between said back portions,screw means for adju'stably drawing said back `portions together atopposite sides of said interposed support, said screw means includingscrews held non-rotatably in said inner back member and clamp nuts onsaid screws over said outer back member.

4. In a sewing machine light, the combination of a supporting ball head,clamp plates at opposite sides of said ball head, screws securing saidclamp plates together at opposite sides of said ball head, said clampplates having angularly extending arms at the ends `of the same withopenings therethrough and a lamp carrying tube slidingly and rotatablyadjustable in said openings, said clamp plates being bendable under thestrain of said screws to grip the ball head and lamp tube under tension.

5. An adjustable sewing machine light, comprising substantially U-shapedclamp members of springy sheet material disposed one within the otherwith the back portions of the same in opposition and the side arms ofthe same in overlapping relation, said side arms having openingstherethrough substantially registering in an untensioned condition ofthe clamp members, a lamp carrying arm extending through said opening inthe overlapping side arms of the substantially U-shaped clamp memberslongitudinally and rotatably adjustable therein in the untensionedrelation of said clamp members, a support interposed between the opposedback portions' of the clamp members and means connecting said opposedback portions at opposite sides of said interposed support adjustablefor springing said back portions together in clamping engagement on theinterposed support and for eiecting Consequent relative displacement ofsaid overlapping side armsof said clampmembers to clampingly engage andhold the lamp carrying arm extending `through the openings in said vsidearms.

MAX INGV? ER. 'WERNER W'. .SCHVV'ARZ

